I personally hear stories that modern Ferrari clutches still suffer (like the story that gave birth to Lamborghini).
AWD Lambo geartrains are crap, Corvette frames twist permanently after an autocross evening, Porsche gearboxes and CV joints break like glass. BMW and Mercedes rear ends tend to howl, and so on...

What are the strong and weak points of modern sportcars?

Are there any tank-durable cars capable of surviving modern performance? i.e. like somebody who takes his daily driver to the autocross every weekend for two years?